Influence of the annealing temperature on the tetracycline photocatalytic degradation of (C, N, S) co-doped TiO2 materials
Abstract
C, N and S co- doped TiO 2 samples (TH-TiO 2-a ) were synthesized by the hydrothermal method using thiourea and TiOSO 4 prepared from Ilmenite ore. The influence of the annealing temperature on the tetracycline photocatalytic degradation of the TH-TiO 2-a samples was systematically investigated. Photocatalytic activities of all samples were evaluated by the photodegradation of tetracycline antibiotics at 30 mg/L under the visible light irradiation . It is found that the annealing temperature plays an important role in the crystallization of the samples. The C, N and S co- doped TiO 2 sample annealed at 500 °C in air for 1 hour exhibits the best photocatalytic activity . It is worth mentioning that annealing at 500 °C improves crystallinity, effectively eliminates organic residues on the surface, controls particle sizes , and significantly improves the photocatalytic activity of the obtained sample .